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Finding the Fourth Proportional to 8,758.72, 13,133.70 and 2,913.28

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Solution

The fourth proportional to 8,758.72, 13,133.70 and 2,913.28 is: 4,368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.72 : 13,133.70 = 2,913.28 : x
  2. Step 2: Convert to fraction form
    8,758.72/13,133.70 = 2,913.28/x
  3. Step 3: Cross multiply
    8,758.72x = 13,133.70 × 2,913.28
  4. Step 4: Simplify right side
    8,758.72x = 38,262,145.54
  5. Step 5: Solve for x
    x = 38,262,145.54/8,758.72
  6. Step 6: Final answer
    x = 4,368.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.